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ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

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Year 2006

• 1Turbulence, Heat and Mass Transfer 5
Proceeding of The International Symposium on Turbulence, Heat and Mass Transfer - Dubrovnik, Croatia, September 25-29, 2006

806 pages

Volume price - $246.00

Aiding Mixed Convection Heat Transfer in the Vertical Flat Channel in a Laminar-Turbulent Transition Region

Povilas Poskas
Lithuanian Energy Institute, Branduolinës inzinerijos problemø laboratorija, Breslaujos str. 3, LT-44403 Kaunas, Lithuania

Robertas Poskas
Lithuanian Energy Institute, Branduolinës inzinerijos problemø laboratorija, Breslaujos str. 3, LT-44403 Kaunas, Lithuania

Rimantas Zujus
Lithuanian Energy Institute, Branduolinës inzinerijos problemø laboratorija, Breslaujos str. 3, LT-44403 Kaunas, Lithuania

J. Jankauskas
Nuclear Engineering Laboratory, Lithuanian Energy Institute, Breslaujos 3, LT-44403 Kaunas, Lithuania

ABSTRACT

In this paper we present the results on experimental and numerical investigation of aiding mixed convection in a vertical flat channel with symmetrical heating in the laminar-turbulent transition region. The experiments on local heat transfer were performed in airflow (p = 0.1, 0.2 and 0.4 MPa) in the range of Re from 2 · 10³ to 4.9 · 10⁴ and Gr_q up to 1.3 · 10¹⁰ for the limiting condition q_w1 = q_w2 = const. Numerical two-dimensional simulations were performed for the same conditions as in experiments using the FLUENT 6.2 code.